41.
\[D-\left( + \right)-\] Glucose \[\xrightarrow{5{{\left( C{{H}_{3}}CO \right)}_{2}}O}D-\left( + \right)-\] Glucose pentaacetate
Which statement is true about glucose pentaacetate ?
A
It will react with phenylhydrazine but not with Tollens’ reagent.
B
It will react with Tollens’ reagent but not with phenylhydrazine.
C
It will react with both of the above mentioned reagents.
D
It will react neither with phenylhydrazine nor with Tollens’ reagent.
Answer :
It will react neither with phenylhydrazine nor with Tollens’ reagent.
42. If one strand of $$DNA$$ has the sequence $$ATGCTTGA,$$ the sequence in the complimentary strand would be
A
$$TCCGAACT$$
B
$$TACGTAGT$$
C
$$TACGAATC$$
D
$$TACGAACT$$
Answer :
$$TACGAACT$$
43. Among the naturally occurring carbohydrates, furanose ring is found in the
A
glucose unit of cane sugar
B
glucose unit of cellulose
C
fructose unit of cane sugar
D
galactose unit of lactose
Answer :
fructose unit of cane sugar
44. Which of the following evolves carbon dioxide, on oxidation with periodate ?
A
B
C
D
Answer :
45.
Match the column I with column II and mark the appropriate choice.
| Column I | Column II | ||
|---|---|---|---|
| a. | Peptide linkage | 1. | Inversion |
| b. | Nucleic acid | 2. | Polysaccharide |
| c. | Hydrolysis of cane sugar | 3. | Proteins |
| d. | Starch | 4. | Nucleotides |
A
a - 2, b - 1, c - 3, d - 4
B
a - 4, b - 1, c - 2, d - 3
C
a - 3, b - 4, c - 1, d - 2
D
a - 1, b - 3, c - 4, d - 2
Answer :
a - 3, b - 4, c - 1, d - 2
46.
Match the vitamins given in column I with the deficiency diseases caused by it given in column II and mark the appropriate choice.
| Column I | Column II | ||
|---|---|---|---|
| a. | Vitamin $${B_1}$$ | 1. | Convulsions |
| b. | Vitamin $${B_2}$$ | 2. | Pernicious anaemia |
| c. | Vitamin $${B_{12}}$$ | 3. | Beri-beri |
| d. | Vitamin $${B_6}$$ | 4. | Cheilosis |
A
a - 4, b - 3, c - 1, d - 2
B
a - 1, b - 4, c - 3, d - 2
C
a - 2, b - 1, c - 4, d - 3
D
a - 3, b - 4, c - 2, d - 1
Answer :
a - 3, b - 4, c - 2, d - 1
47. In reference to biological role, $$C{a^{2 + }}$$ $$ions$$ are important in
A
triggering the contraction of muscles
B
generating the right electrode potential across cell membrane
C
hydrolysis of $$ATP$$
D
defence mechanism
Answer :
generating the right electrode potential across cell membrane
48. A unit in nucleic acid which contains 'base-sugar phosphate' unit is called
A
nucleotide
B
nucleoside
C
phosphotide
D
polypeptide
Answer :
nucleotide
49. A nucleoside on hydrolysis gives
A
an aldopentose and a nitrogenous base
B
an aldopentose and phosphoric acid
C
an aldopentose, a nitrogenous base phosphoric acid
D
a nitrogenous base and phosphoric acid
Answer :
an aldopentose and a nitrogenous base
50. Which of the following compounds is found abundantly in nature?
A
Fructose
B
Starch
C
Glucose
D
Cellulose
Answer :
Cellulose